The Hound of the Baskervilles, A Study in Scarlet, The Sign of Four

Contains:
Hound of the Baskervilles
[Sign of Four](https://openlibrary.org/works/OL262585W/The_Sign_of_Four)
[Study in Scarlet](https://openlibrary.org/works/OL16290253W/A_Study_in_Scarlet)